22 



TOPOGBAPHICAL ANATOMY OF 



branch of the axillary. Arising opposite the cleft between the 

 subscapularis and teres major, it immediately disappears between 

 these muscles. In order that the course of the artery may be followed, 

 it is necessary to detach the greater part of the teres major from its 

 origin. When this has been done, the artery can be traced along 

 nearly the whole of the axillary border of the scapula. It ends in the 



A. circumflexa scapula'. * 



A. axillaris.. 



A. thoracoacromialis. - 



A. subscapularis. 



A. circumflexa humeri 

 anterior. 



A. brachialis. 



A. collateralis raclialis. — 



A. mediana 



A. retis carpi voluris. - 



A. thoracodorsalis. 



— -A. circumflexa humeri posterior. 

 - A. profunda brachii. 



A. nutritia humeri. 

 A. collateralis ulnaris. 



A. interossea communis. 



A. metacarpea volaris 



lateralis. 

 -A. digitalis communis. 

 A. metacarpa volaris 



medialis. 



Fig. 11.— Diagram of the Arteries of the Thoracic Limb. 



infraspinous muscle, which is reached by bending round the border 

 of the scapula. 



The branches of the subscapular are as follows : — 



1. A. thoracodorsalis. — Arising close to the commencement of the 

 subscapular, the long thoracodorsal artery crosses the medial surface 

 of the teres major and ends in the latissimus dorsi and cutaneous 

 muscles. Small twigs are furnished to the axillary lymph glands. 



2. A. circumflexa humeri posterior. — The posterior circumflex 



